Demonstration of wide-angle beam steering optics in wavelength-division-multiplexing indoor optical wireless LAN with dedicated CMOS imager

  • Authors:

  • Keiichiro Kagawa;Jun Tanida

  • Affiliations:

  • Osaka University, Suita City, Osaka, Japan;Osaka University, Suita City, Osaka, Japan

  • Venue:
  • Proceedings of the 3rd International Conference on Bio-Inspired Models of Network, Information and Computing Sytems
  • Year:
  • 2008

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Abstract

We are developing a new indoor optical wireless LAN system, in which dedicated CMOS imagers are utilized to offer location-aware visually-intuitive wireless communications, wavelength- or space-division-multiplexing high-speed data transfer, and compact hardware. This paper focuses on a wide-angle beam steering optics, which is a key component to realize a compact and wide-angle optical transmitter accessible to the network from anywhere in a room with 5 m by 5 m size. A prototype beam steering lens designed for a near-infrared wavelength of an 850-nm band was fabricated and demonstrated. Experimental results show that the maximum output beam angle was about ±60 degrees, which covers the 5m-by-5m room (when the vertical distance between a hub and a node was 2.0 m), and the optical power efficiency was higher than 0.8 which equals to about 1dB loss.